text.skipToContent text.skipToNavigation

warning.svgOrders shipping outside of United States will be on hold while the company evaluates tariff impacts.
Please contact your salesperson for assistance.

Truck-Icon.svgFree shipping within the continental US over $50. Conditions apply

  1. home
  2. Semiconductors
  3. Real Time Clocks
  4. M41ST87WMX6TR

STMicroelectronics | M41ST87WMX6TR

Manufacturer Part #

M41ST87WMX6TR

M41ST Series 3.3 V SMT 128 Byte NVRAM Tamper Detection Supervisor - SOIC-28

ECAD Model:
Mfr. Name: STMicroelectronics
Standard Pkg:
Product Variant Information section
Date Code: 2447
Product Specification Section
STMicroelectronics M41ST87WMX6TR - Technical Attributes
Attributes Table
Date Format: DW:DM:M:Y
Time Format: HH:MM:SS:hh
Interface: I2C / 2-Wire / Serial
Non-Volatile Memory Size: 128B
SRAM Size: 160b
Supply Voltage-Nom: 2.7V to 3.6V
Temperature Grade: Industrial
Operating Temp Range: -40°C to +85°C
Storage Temperature Range: -55°C to +125°C
Package Style:  SOIC-28
Mounting Method: Surface Mount
Features & Applications
The M41ST87WMX6TR is a serial RTC and NVRAM supervisor is a low power 1280-bit, static CMOS SRAM organized as 160 bytes by 8 bits. A built-in 32.768 kHz oscillator (internal crystal-controlled) and 8 bytes of the SRAM are used for the clock/calendar function and are configured in binary coded decimal (BCD) format.

An additional 11 bytes of RAM provide calibration, status/control of alarm, watchdog, tamper, and square wave functions. 8 bytes of ROM and finally 128 bytes of user RAM are also provided. Addresses and data are transferred serially via a two line, bidirectional I²C interface. It has an Operating temperature ranges b/w -40 °C to 85 °C and available in a SOX-28 package.

Features:

  • 5.0, 3.3, or 3.0 V operation
  • 400 kHz I2C bus
  • NVRAM supervisor to non-volatize external LPSRAM
  • 2.5 to 5.5 V oscillator operating voltage
  • Automatic switchover and deselect circuitry
  • Two independent power-fail comparators (1.25 V reference)
  • Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, and century
  • 128 bytes of clearable, general purpose NVRAM
  • Programmable alarm and interrupt function (valid even during battery backup mode)
  • Programmable watchdog timer
  • Unique electronic serial number (8-byte)
  • 32 kHz frequency output available upon poweron
  • Microprocessor power-on reset output
  • Battery low flag
  • Ultra-low battery supply current of 500 nA (typ)
Pricing Section
Global Stock:
2,000
USA:
2,000
On Order:
0
Factory Stock:Factory Stock:
-1
Factory Lead Time:
24 Weeks
Minimum Order:
1000
Multiple Of:
1000
Total
$5,080.00
USD
Quantity
Unit Price
1,000+
$5.08
Product Variant Information section